Josef steiatee



(No Model.)

J. STEINER.-

ELBGTRO MAGNET ARMATURE.

Patented Nov. 3, 1885.

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NITED STATES PATENT ()FFICE...

JOSEF STEINER, or BROOKLYN, NEW YORK.

ELECTRO=MAGNET ARMATU RE.

SPECIFICATION forming part of Letters Patent No. 329,782, dated November 3, 1885. Application filed August 13, 1885. Serial No. 174,297. (No model.)

To all whom it may concern.-

Be it known that I, J OSEF STEINER, a citizen of the United States. residing at Brookl vn, in the county of Kings and State of New York, have invented new and useful Improvements in Electro-Magnet Armatures, of which the following is a specification.

My invention relates to improvements in the construction of electro-magnets having but one helix or bobbin of wire and a movable or swinging armature, and the method of adaptation of their several parts each to the others.

The object of myinvention is to contract the dimensions of electrical apparatus in which electro-magnets are employed without decreasing its efficiency.

The novel features of construction and arrangement of parts are fully pointed out in the following specification and claim, and illustrated in the accompanying drawings, in which Figure 1 represents a side elevation of the working parts of an electric call-bell embodying my invention. Fig. 2 is a central vertical section of the same. Fig. 8 is a side elevation of a modification of the same. Fig. 4 is a detail view of parts on a larger scale than the preceding figures.

Similar letters indicate corresponding parts.

In the drawings the letter A designates a helix or coil of wire encircling the iron magnet-core B in the usual manner.

0 O are pieces of iron secured to the ends of the core B by screws 0 c, or by other suitable means, which pieces 0 C extend the magnetic poles beyond the circumference of the helix or coil A.

The core B and the pieces of iron 0 O,which I shall hereinafter term pole-extensions, may be made of one piece of iron; but for convenience of manufacture I prefer to make the said parts in separate pieces.

D is a soft-iron armature, the lower end of which is attached to the pole-extension O by a flat spring, D, in such a manner that while the said armature D is always in actual contact With the pole-extension 0, yet it is permitted to vibrate with a freedom proportion ate to the flexibility of the flat spring D.

In Fig. 4 will be more clearly seen the method of hinging the armature D to the pole-extension O, and also shows the advantage of so hinging the said armature.

By reference to Fig. 4 it will be seen that the spring D is so set or bent that normally the armature D inclines to the right, its corner only coming in contact with pole-extension O, and it is obvious that if armature D is forced to the left it will assume the upright position shown by dotted lines in Fig. 4, and then the surface of its whole lower end will be in con tact with the upper surface of the pole-extension 0, and the meeting of these surfaces limits its movements to the left. By so attaching the armature D to the pole-extension 0 there is an evident freedom from friction, and no lost motion at the point of suspension, as when the armature is hinged by pivots, swivel or other devices. In Fig. 3 a slight modification of the same principle is shown, the face of the poleextension Oin this case abutting the inner side of the armature D, while in Fig. 4 the lower end of the armature D abuts the upper side of the pole-extension O. The armature D, Figs. 1 and 2, extends from the pole-extension C upward directly in front of and alittle beyond the upper pole-extension, O, and from its upper end projects the ball-hammer D in a wellknown manner. On the top and next to the upper pole-extension, G, is a non-magnetic and a non-conducting piece,f, of somewhat similar shape as the pole-extension C, but projecting a little nearer the armature D, which serves to keep the armature D from coming in close contact with the end of the pole-extension 0, thereby preventing the said armature from the sticking caused by residual magnetism. Above the non-conducting piecef is a metallic arm, F, which arm is secured to poleextension 0 and core B by the screw 0, but is insulated from both the same by the non-conducting piecef and the non-conducting bushingf. The purpose of the arm F is to support the platina-pointed contact-screw ll, placed opposite the circuit-breaker,by extending the flat spring D. An oblong slot or hole,

d, in the arm F allows the bell-hammer D to pass upward unobstructed through said arm F. The electrical connections are the wellknown connections of the ordinary vibrating electric call-bell, the current from a suitable battery entering wire 1 to helix A; thence by wire 1 to arniF and eontaet-screw E; thence to wire 2, through spring D andrpole-extensien O, and from wire 2 to battery. It is obvious that when the current magnetizes the core B and attracts the armature D the contest between screw E and spring D will bebetween the upper end of armature D andupper po1e-eXtension,C.

What I claim as new, and desire to secure by Letters Patent, is-

The combination of the helix. or coil A, the pole-extensions O C, the movable armature D, having one end maintained at all times in direct contact with the pole-extension C, the fiat spring D, connecting said armature to said pole-extension,the nonconducting piece f, the

metallic arm F, the non-conducting bushing securing said arm, and the contactpoint E, carried by said arm in the path of the flat spring, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of twosub scribing witnesses.

J OSEF STEINER. [L. s]

\Vitnesses:

E. F. KASTENHUBER,

A. FABER DU FAUR, J r.v 

